Get The Fertility Survey Form Is Online - International Leonberger Union

Inbreeding levels of 5-10% will have modest detrimental effects on the offspring. Inbreeding levels above 10% will have significant effects not just on the quality of the offspring, but there will also be detrimental effects on the breed. Do I still have to worry about COI if I am doing the health tests for my breed?

Background. Leonberger is a giant dog breed formed in the 1850s in Germany. Its post-World War II popularity has resulted in a current global population of ~ 30,000 dogs.

The average size of a Leonberger litter is 6 to 8, though 10-12 also occurs.

The Leonberger received American Kennel Club recognition as a member of the Working Group on January 1, 2010, alongside the Icelandic Sheepdog and the Cane Corso.

The 'tipping point', over which the health of the breed begins to be affected, is 10% - as explained in this useful article. Breeders should definitely not be breeding litters with COIs higher than 10%. Below 5%, is ideal.

Inbreeding in dogs has real consequences. Research in the Boyko Lab has shown that a 10% increase in inbreeding can lead to a 6% reduction in adult size (poor growth) and a six- to ten-month reduction in lifespan. Reduced litter size and fertility are also likely.

Inbreeding levels above 10% will have significant effects not just on the quality of the offspring, but there will also be detrimental effects on the breed.

What is a normal inbreeding coefficient? When learning how to calculate the inbreeding coefficient, the lower the inbreeding coefficient, the lower co-ancestries or shared genes. A value lower than 5% is desirable.